Special issue containing papers presented at the 12th IAEA Technical Meeting on Energetic Particles in Magnetic Confinement Systems (7–11 September 2011)

Nuclear Fushion

article

H.L. Berk¹ 

[1] Institute for Fusion Studies, University of Texas at Austin

关键词: asteroseismology;    methods: analytical;    stars: oscillations;    stars: rotation;    stars: solar-type;   

DOI  :  10.1088/0029-5515/52/9/090301

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

Understanding differential rotation of Sun-like stars is of great importance for insight into the angular momentumtransport in these stars. One means of gaining such information is that of asteroseismology. By a forward modelingapproach we analyze in a qualitative manner the impact of different differential rotation profiles on the splittingsof p-mode oscillation frequencies. The optimum modes for inference on differential rotation are identified alongwith the best value of the stellar inclination angle. We find that in general it is not likely that asteroseismologycan be used to make an unambiguous distinction between a rotation profile such as a conical Sun-like profile anda cylindrical profile. In addition, it seems unlikely that asteroseismology of Sun-like stars will result in inferenceson the radial profile of the differential rotation, such as can be done for red giants. At best, one could possiblyobtain the sign of the radial differential rotation gradient. Measurements of the extent of the latitudinal differentialfrom frequency splitting are, however, more promising. One very interesting aspect that could likely be tested fromfrequency splittings is whether the differential rotation is solar-like or anti-solar-like in nature, in the sense that asolar-like profile has an equator rotating faster than the poles.

【 授权许可】

Unknown